CNN - Iran's finance minister believes oil prices could rise as high as $160 a barrel thanks to sanctions over its nuclear program, a prediction that comes just as the chief of the United Nations nuclear watchdog agency headed to Tehran on Sunday for high-level talks."We must pay close attention when we speak of oil revenues and sanctions against oil sales, who are the winners and the losers of such sanctions?" Shamseddin Hosseini told CNN's "Fareed Zakaria GPS" in an interview that airs Sunday. Read more.